Island



(No Model.) 2.8heets-Sheet 1.

s. MOORE.

MACHINE FOR' MAKING TWIST DRILLS."

N03432,635. Patented July 22, 1890.

. INVENTDR- S7 Nx B N WI TN E5555.

I'HHI: HillllllllllllllfiJllllllllllllllll (No Model.)

S. MOORE.

2 Shets- SheetfQ.

MACHINE FOR MAKING TWIST DRILL S.

Ila-432,635

El I

a lul gil-l v g m Patented July 2-2, 1890.

f FE mm =4 vl lllllll UNITED STATES SAMUEL MUURE, ()F PROVIDENCE,

PATENT OFFICE.

RHODE ISLAND, ASSIGNOR, BY MESNE ASSIGNMENTS, TO T 1115 UNITED S'IATES TWIST DRILL COMPANY, OF

SAME PLACE.

MACHINE FOR MAKING TWIST-DRILLS.

SPECIFICATION forming part of Letters Patent No. 432,635, dated July 22, 1890.

Application filed May 21, 1886. Serial No. 202,836. (No model.)

To all 1071 0122, it may concern.-

3c it known that I, SAMUEL Moons, a citizen of the I'nited States, residing in the city. and county of Providence, inthe State of 5 Rhode Island, have invented a new and useing and shaping drill-blanks, or as fill Improvement in Machines for Making 'lwist-Drills, of which thefollowing is a specification.

My invention relates to a machine for groovit is called, rolling the blanks preparatory to twisting them and it consists in the arrangement and combination of rotary dies and horizontal rolls, and in the means provided for adjusting and automatically moving the horizontal rolls laterally to engage and release the drillblank.

The purpose of my invention is to provide means for grooving and rolling drill-blanks 2o uniformly and without injury to the metal -and to perfect the side faces and grooved faces of the blank atthe same operation of the machine,

In the accompanying drawings, Figure 1 is a longitudinal central section of the material portion of the machine. Fig. 2 is a central cross'section on line on of Fig. 1, showing the vertical dies with engaged blank. Fig. 3 is a plan section on the irregular line :r .r of Fig.

0 1. Fig; lis an end view of the train of gears 0 same vertical plane,

for adjusting the horizontal rolls. Figs. 5 and 6 are details of the adj ustingplate and collar.

Similar letters denotelike parts where they occur in the drawings.

A A represent a table con'unon to lathes and analogous machines.-

1- l) is a housing secured upon the table and having ,iournaled in it the shafts C- U", placed one above the other, with their axes in v the and carryingthe rotary dies or rolls 1) l). The faces of the rolls or dies l) I) may he flat or convex. The fiatfaced dies are used to first fiattcnthe blank. Then the convex-faced rolls are used to roll in the groove. The die-face is cut away for a short distance, as shown in Fig. 2. The raised portion of the faccis of sufficient length to roll the flattened or grooved portion of the blank, and as the dies roll along the blank horizontal rolls 1* F,

the cut-away portion affords room for the shank of the blank to clear itself, and for the entrance of the shank of a new blank to be made between the two dies.

In the housing 13 T3 are chambers in which I place the boxes E E, in which are pinned which have faces slightly concaved to give form to the sides of the drillblauk. These rolls turn freely on their pins 8 e by friction only, against the sides of the blzhik, or in some cases against the side faces of the upper. and lower dies. The axes of the horizontal rolls are at right angles to the axes of the dies, as shown in Fig. 1. The boxes E E have a beveled rib a a on their outer edges, which meets oppositely-beveled ribs or a on the inner faces of the adjustingplates 1) b, which are held in place against the boxes with their rib a resting against the rib a of theboxes E by a train of gears c c 6*, attached to the sides of the housing I; B, as shown in Fig. '1. The central gear 0' isheld by a check-nut-n. When the dies and horizontal rolls each have flat faces, the rolls are held firmly after adjustment by the plate I) and the train of gears c c It is necessary, however, that in rolling drill-blanks means should be provided whereby the horizontal rolls may free themselves to clear the drill-blank shankfrom the rolls. To accomplish this automatically, I fit upon the shaft C, exterior to the housing cam, rolls or rollers'd (I, and form on the under side of. the plates 1; pendent lugs b 1), adapted to ride on the faces of the rolls d (I- and to drop at suitable times into the depression (1 in the faces of the rolls, thereby freeing the plate-ribs a d from contact with the ribs a a and allowing the plate to drop and the rolls if F to separate. volve with the shaft (3 the lugs b I) will ride up onto the raised portioirof the face of the rolls (Z (I and crowd the ribs a an" a" together and bring the faces of the rolls F F into position to again press against the sides of the blank (I. Again, it is necessary in grooving and flattening the drill-blank that the upper and lower dies act at the same instant upon the blank, in order to secure the requisite uniformity in the grooves on both faces of As the rolls (1 (1 renicely adjusted will be of uniform length and depth through and C gears, and it is essential that they ihe blank; The C operated by a train of mesh-properly to 'move in perfect unison. To this end I providea wedge or beveled spline .k, by

which the gear m upon-the upper-shaft O is upper and lower shafts are united and the lower shaft 0 at the the two dies D and D and grip the blank at that the grooves in the proper point to cause to revolve in unison the same instant, so faces of the blank G the blank readily. I therefore remove a per- 7 as sliow-n'in Fig. 3.

tion of the per phery of the die'on one side and slightly thicken or enlarge it on the opposite side'and allow the periphery to taper slightly from the center of the enlargedside back to the shallow side. This construction of the dies enables me torolladouble blank,

in which the grooves enter and leave the blank on a taper and are the middle of their length,

The blank G is steadied H-H, adj usted; by set against the housing slightly deeper in as shown in Fig. 2 by t'unneled guides bolts s s, impinging B B, and pivoted at a: .70, The'upper and lower dies and their shafts C 0' are adjustable in the housing by the ordinar T means I I I I and train of gears J J.

. In the'event that it should be desirable at any timevto hold thehorizontal rolls F F them to free themselves,

as hereinbefore described, I would substitute for the" cam-rolls (Z (Z ordinary faced rolls, thereby preventing the plates h b from dropping to free the rolls F F. I

Modifications in the form and proportions of therolls and dies may be made without departing from the principle of my invention. I claim as my invention and desire to secure by Letters Patentto mesh with the gearm' upon 1. The combination ofthe rolls F F. boxes E E, provided with the beveled riha, plate I),

provided with the beveled rib a, and train of.

and adapted to operate in conblanks for twist-drills and analogous articles,

the horizontal rolls F F, boxes E E, provided with the beveled rib a, the plate I provided with pendent lug b,-cam-rolls d ('Z,'train of gears c 0' c and shaft 0, combined with each other and arranged for joint operation, as specified, whereby the drills F F'are automatically caused to approach and reeedfe horizontally to engage and free the blank.

3. -'1he-com-b.ination of the shaft 0', gearm, and beveled Wedge 7t, arranged for joint operation, as specified.

t 4. The within-described adj ustable guides for a blank, consisting of the arms ll l'Lpivotcd at .r r, in combination with the tap-bolts s s, arranged to'impinge against the housing B B, as sho wn,and adapted to serve as-specifled. Y

5. The die D, consisting, as'specilicd, of a roll or collar having a peripheral rim or flange extending only partly around it, said'riin or flange being thickest in the middle of its length and tapering slightly from that point back along each side of the roll toward the points of therise and fallof said flange into the face of the roll, whereby a drill-blank is rolled or grooved'thinnest in the, middle and with the grooved or flattened side entering and leaving the body of the drill ona taper, as shown and described In testimony whereof- I have horenntoset my hand, in presence of two witnesses, this 18th day of May, 1886.

SAMUEL MOORE. 5 Vitnesses:

HENRY M ARSH, Jr., NATHAN I-I. FRUMAN. 

